Trigonometry can be used to find the length of a side in a triangle. Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing side in a right-angled ...

and measurement. What it means is that in a right triangle (where one angle equals 90°), the sum of the squares of two sides equals the square of the hypotenuse (the longest side).

Also like Archimedes' approach, the interactive determines the length of a side of each triangle, relative to the diameter, based on the angle opposing the side being measured. Our interactive ...